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Reactive coordinated optimal operation of distributed wind generation

ENERGY 2021年 218卷 119417-119417页

作者： Xiang, Yue Zhou, Lili Huang, Yuan Zhang, Xin Liu, Youbo Liu, Junyong Sichuan Univ Coll Elect Engn Chengdu 610065 Peoples R China Cranfield Univ Energy & Power Theme Cranfield MK43 0AL Beds England

Large-scale distributed wind generation (DWG) integration brings new challenges to the optimal operation of the distribution network. The reactive supports from wind turbines (WTs) and reactive power resources can improve both the operation economy and renewable energy consumption. In this paper, a multi-period reactive coordinated optimal operation model for DWG in the distribution network is established. The active-reactive power coordination characteristics of two typical types of WTs are considered and the operating strategy of reactive power resources is integrated in the model. The second-order cone programming (SOCP) is developed to transform the original nonlinear power flow model into a linear and convex model, which would significantly improve the power flow calculation efficiency for DWG penetrated distribution network. The simulation results show that the integration of reactive power resources can further promote the consumption of DWG and improve the operating profits of the distribution network. (C) 2020 Elsevier Ltd. All rights reserved.

关键词： distributed wind generation Optimal operation Active-reactive power coordination Reactive power resources Economic benefits

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Reactive Power Control Strategy of Distribution Network with distributed wind generation Based on Scene Analysis

Reactive Power Control Strategy of Distribution Network with...

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International Conference on Power System Technology (POWERCON)

作者： Li Guichang Li Jie Li Yulai Huang Yi Hong Qinchao Guangzhou Power Elect Technol Co Ltd Prod Dept Guangzhou 510670 Guangdong Peoples R China Guangzhou Power Elect Technol Co Ltd Guangzhou Guangdong Peoples R China

ISBN: (纸本)9781538664612

The distributed wind generation (DWG) is an important future development direction of renewable energy, with its environmental adaptability, little influence of safety and stability and not prominent of consumption. Based on the influence of distribution network, the working characteristics of DWG and the status of reactive power configuration are analyzed at first. Secondly, based on the scene analysis method, the DWG optimization configuration model with the voltage quality as the constraint and the investment recovery period is established, and the optimization model is solved by direct comparison method. Finally, a simulation example is used to verify the effect of the proposed reactive configuration policy. The results show that the proposed strategy is applicable and can provide guidance for the reactive power allocation problem of DWG access to distribution network.

关键词： distributed wind generation configuration strategy scene analysis static var generator

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Characterisation of large disturbance rotor angle and voltage stability in interconnected power networks with distributed wind generation

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IET RENEWABLE POWER generation 2015年第3期9卷 272-283页

作者： Meegahapola, Lasantha Littler, Tim RMIT Univ Sch Elect & Comp Engn Melbourne 3001 Australia Queens Univ Belfast Sch Elect Elect Engn & Comp Sci Belfast BT9 5AH Antrim North Ireland

wind generation in highly interconnected power networks creates local and centralised stability issues based on their proximity to conventional synchronous generators and load centres. This study examines the large disturbance stability issues (i.e. rotor angle and voltage stability) in power networks with geographically distributed wind resources in the context of a number of dispatch scenarios based on profiles of historical wind generation for a real power network. Stability issues have been analysed using novel stability indices developed from dynamic characteristics of wind generation. The results of this study show that localised stability issues worsen when significant penetration of both conventional and wind generation is present because of their non-complementary characteristics. In contrast, network stability improves when either high penetration of wind and synchronous generation is present in the network. Therefore network regions can be clustered into two distinct stability groups (i.e. superior stability and inferior stability regions). Network stability improves when a voltage control strategy is implemented at wind farms, however both stability clusters remain unchanged irrespective of change in the control strategy. Moreover, this study has shown that the enhanced fault ride-through strategy for wind farms can improve both voltage and rotor angle stability locally, but only a marginal improvement is evident in neighbouring regions.

关键词： rotors wind power plants distributed power generation synchronous generators power generation dispatch power system dynamic stability voltage control power generation control power supply quality power generation faults large-disturbance rotor angle stability characteristics voltage stability characteristics distributed wind generation highly-interconnected power networks centralised stability issue local stability issue synchronous generators load centres disturbance stability issue geographically-distributed wind resources dispatch scenario historical wind generation real-power network stability indices wind generation dynamic characteristics localised stability issue wind generation penetration synchronous generation penetration superior stability region inferior stability region voltage control strategy stability cluster enhanced fault ride-through strategy wind farms

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Optimal Configuration Method of distributed Hybrid Energy Storage Systems in Distribution Network with Large Scale of wind Power generation 4th

Optimal Configuration Method of Distributed Hybrid Energy St...

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4th International Forum on Smart Grid Protection and Control (Purple Mountain Forum)

作者： Yang, Tianmeng Han, Zhentao Gao, Jing Econ Tech Res Inst Liaoning Elect Co Ltd Shenyang Peoples R China

ISBN: (纸本)9789811397837;9789811397820

To promote the coordinated development between distributed wind generation and distribution network, and to improve the absorptive capacity of wind generation, a hybrid energy storage system allocated in the distribution network is put forward, which is composed by battery and small-scale compressed air energy storage system. And the optimal configuration method is discussed. The battery is used to mitigate the wind power output fluctuation thanks to its quick response capacity, and the small-scale compressed air energy storage system is used for peak regulation thanks to its flexible allocation and large energy density. The operational principle of the hybrid energy storage system is discussed, and the peak load regulation method of the small-scale compressed air energy storage system is presented. Based on the research of the allocation of hybrid energy storage system, the capacity optimization and the optimal operation, the optimal configuration method of the hybrid energy storage system is discussed. The proposed model and the method are verified on the modified distribution network, and the results prove the effectiveness and flexibility of the model.

关键词： distributed wind generation Distribution network Hybrid energy storage system Battery storage Compressed air energy storage system Optimal sizing

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Planning for distributed wind generation under active management mode

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INTERNATIONAL JOURNAL OF ELECTRICAL POWER & ENERGY SYSTEMS 2013年第May期47卷 140-146页

作者： Zhang, Jietan Fan, Hong Tang, Wenting Wang, Maochun Cheng, Haozhong Yao, Liangzhong Qinghai Elect Power Co Xining 810008 Qinghai Provinc Peoples R China Shanghai Univ Elect Power Elect Power & Automat Engn Shanghai 200090 Peoples R China Shanghai Jiao Tong Univ Dept Elect Engn Shanghai 200240 Peoples R China Alstom Grid Stafford ST17 4LX England

In the smart grid (SG), the active management (AM) mode will be applied for the connection and operation of distributed generation (DG), which means real time control and management of DG units and distribution network devices based on real time measurements of primary system parameters. In this paper, a novel bi-level programming model for distributed wind generation (DWG) planning under AM mode is put forward. The model takes the maximum expectation of net benefit of DWG as the upper level program objective, and takes the minimum expectation of generation curtailment as the lower level program objective. The impact of active management algorithm on improvement of branch power flow and node voltage is taken into account. A hybrid algorithm combining the plant growth simulation algorithm (PGSA) with probabilistic optimal power flow (POPF) algorithm is presented to solve the optimal planning of DWG under AM mode. The case studies have been carried out on a 33-node distribution network, and the results verify the rationality of the planning model and the effectiveness of the proposed method. (c) 2012 Elsevier Ltd. All rights reserved.

关键词： Active management distributed wind generation Distribution network Planning Plant growth simulation algorithm Probabilistic optimal power flow

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Research on distributed streaming parallel computing of large scale wind DFIGs from the perspective of Ecological Marxism

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ENERGY REPORTS 2022年 8卷 304-312页

作者： Xue, He Beijing Foreign Studies Univ Sch Marxism Beijing 100089 Peoples R China Beijing Foreign Studies Univ Res Ctr Cooperat Innovat Socialist Theory Chinese Beijing 100089 Peoples R China

Extreme climate change is the major ecological crisis which mankind encounters at present. The core of coping with climate change is to reduce greenhouse gas emissions, among which is mainly carbon dioxide emissions from fossil energy combustion. Energy substitution of large-scale new energy power generation is an effective solution to the problems. How to simulate and calculate such a large number of wind power generations for planning or stability analysis is a technical challenge, especially the detailed research on the interactive characteristics for hundreds of models with IGBT converter. In this technical field, inspired by the decentralized and distributed ideas of Ecological Marxism theory, decoupling and grid division calculation is carried out for the electromagnetic transient model of a large number of DFIGs. Through the design and development of the data-driven large-scale parallel computing framework, multi-stage high-speed task pipelined parallel calculation is realized. It effectively solves the calculation difficulties in matrix dimension disaster caused by the number increase of wind turbines, theoretically breaks the ceiling effect of fine-grain simulation for large-scale wind power generations, and also waveforms comparison verifies the feasibility and correctness. (C) 2022 The Author(s). Published by Elsevier Ltd.

关键词： Streaming parallel computing distributed wind generation Ecological Marxism

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A distributed incremental update scheme for probability distribution of wind power forecast error

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INTERNATIONAL JOURNAL OF ELECTRICAL POWER & ENERGY SYSTEMS 2020年 121卷 106151-106151页

作者： Jia, Mengshuo Shen, Chen Wang, Zhaojian Tsinghua Univ Dept Elect Engn Beijing 100084 Peoples R China State Key Lab Power Syst Beijing 100084 Peoples R China

Due to the uncertainty of distributed wind generations (DWGs), a better understanding of the probability distributions (PDs) of their wind power forecast errors (WPFEs) can help market participants (MPs) who own DWGs perform better during trading. Under the premise of an accurate PD model, considering the correlation among DWGs and absorbing the new information carried by the latest data are two ways to maintain an accurate PD. These two ways both require the historical and latest wind power and forecast data of all DWGs. Each MP, however, only has access to the data of its own DWGs and may refuse to share these data with MPs belonging to other stakeholders. Besides, because of the endless generation of new data, the PD updating burden increases sharply. Therefore, a distributed strategy is used to avoid raw data collection. In addition, the incremental learning strategy is further applied to reduce the updating burden. Finally, a distributed incremental update scheme is proposed to make each MP continually acquire the latest conditional PD of its DWGs' WPFE. Specifically, the Gaussian-mixture-model-based (GMM-based) joint PD is first used to characterize the correlation among DWGs. Then, a distributed modified incremental GMM algorithm is proposed to enable MPs to update the parameters of the joint PD in a distributed and incremental manner. After that, a distributed derivation algorithm is further proposed to make MPs derive their conditional PD of WPFE from the joint one in a distributed way. Combining the two original algorithms, the complete distributed incremental update scheme is finally achieved, by which each MP can continually obtain its latest conditional PD of its DWGs' WPFE via neighborhood communication and local calculation with its own data. The effectiveness, correctness, and efficiency of the proposed scheme are verified using the dataset from the NREL.

关键词： distributed wind generation Prosumer wind power forecast error Probability distribution distributed incremental learning

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Frequency Excursions in Complex Power Systems - A Modular Approach 7

Frequency Excursions in Complex Power Systems - A Modular Ap...

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7th International Conference on Power Systems (ICPS)

作者： Varwandkar, S. D. Hariharan, M. V. VJ Technol Inst Bombay Maharashtra India Indian Inst Technol Bombay Maharashtra India

ISBN: (纸本)9781538617892

We report a new modular - approach for modeling frequency excursions in complex power systems having generators with widely differing inertias. The approach is based on the concept of module - a subsystem - consisting of one generator and the rest of the power network without other generators. The modules are inherently decoupled by virtue of independence of prime mover turbines and it is conjectured that the dynamics of modules can be superposed. Ideas from quantum mechanics are used to define a new quantum derivative for modeling frequency dynamics of the modules. Superposition follows. Power-frequency relationships and ROCOF-equations are derived for single and multi-generator systems. It is shown that power-drags and frequency-drags exist among generators in multi-generator systems. These drags can cause concern especially in grids with wind generators. To the best of authors' knowledge, theoretical contributions made in this paper have not been reported in power system literature earlier.

关键词： frequency dynamics power system oscillations transient stability distributed wind generation blackouts

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Facing the challenges of distribution systems operation with high wind power penetration

Facing the challenges of distribution systems operation with...

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IEEE Manchester PowerTech

作者： Das, Kaushik Martinez, Edgar Nuno Altin, Mufit Hansen, Anca D. Sorensen, Poul E. Thybo, Gitte Wad Rangard, Michael Skytte, Kasper Moller Tech Univ Denmark Dept Wind Energy Riso Campus Roskilde Denmark Eniig Kasper Moller Skytte Silkeborg Denmark

ISBN: (纸本)9781509042371

This paper addresses the challenges associated with the operation of a distribution system with high penetration of wind power. The paper presents some preliminary investigations of an ongoing Danish research work, which has as main objective to reduce the network losses by optimizing the reactive power flow in 60kV distribution networks through controlling the ability of wind power plants (WPPs) to generate or absorb reactive power. This paper aims to understand the characteristics of a distribution network with high penetration of distributed generation. A detailed analysis of the active and reactive power flows in a real distribution network under different wind and load conditions based on actual measurements is performed in order to understand the correlation between the consumption, wind power production, and the network losses. Conclusive remarks are presented, briefly expressing the track for the future work.

关键词： distributed wind generation distribution system network loss wind turbine capabilities

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Effect of Integration of distributed wind generation into a Real MV Distribution Network: A Case Study Using Measured wind Data and Simulated Load Profiles

Effect of Integration of Distributed Wind Generation into a ...

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IEEE-Power-and-Energy-Society General Meeting

作者： Hemdan, Nasser G. A. Kurrat, M. Braunschweig Univ Technol Inst High Voltage Technol & Elect Power Syst Braunschweig Germany

ISBN: (纸本)9781424483570

The interest in the integration of distributed generation into distribution systems has been increased in different countries all over the world as economic and environmental factors drive new technologies to be more efficient and less polluting than their earlier counterparts. As the penetration level of DG increases, the distribution system performance has to be analyzed in details. This work investigates the effects of distributed wind generation (DWG) on voltage ranges, voltage profiles, and system MWh losses of a real MV distribution network. The availability to integrate a new wind mill into the system that already contains three wind mills is examined with respect to the technical conditions for generation connection to the MV networks introduced by German Energy and Water Federation. In the simulation, we used a one year measured wind data and simulated load profiles of the households which are connected to the LV side at each MV substation.

关键词： Distribution system distributed wind generation load profiles system losses voltage profiles

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